PBDB Interval Range

56 - 47.8 Ma

International Chronostratigraphic Timescale			North American Land Mammal Ages	Cenozoic Subepochs
Quaternary	Holocene	Meghalayan	Saintaugustinean		0
		Meghalayan	Santarosean		0.0004
		Northgrippian			0.0042
		Greenlandian			0.0082
	Pleistocene	Late Pleistocene		Late Pleistocene	0.0117
		Late Pleistocene	Rancholabrean	Late Pleistocene	0.014
		Chibanian	Rancholabrean	Middle Pleistocene	0.129
		Chibanian	Irvingtonian	Middle Pleistocene	0.21
		Calabrian	Irvingtonian	Early Pleistocene	0.774
		Calabrian	Blancan		1.4
		Gelasian			1.8
Neogene	Pliocene	Piacenzian		Late Pliocene	2.58
		Zanclean		Early Pliocene	3.6
		Zanclean	Hemphillian	Early Pliocene	4.7
	Miocene	Messinian		Late Miocene	5.333
		Tortonian			7.246
		Tortonian	Clarendonian		9.4
		Serravallian	Clarendonian	Middle Miocene	11.63
		Serravallian	Barstovian		12.5
		Langhian			13.82
		Burdigalian		Early Miocene	15.98
			Hemingfordian		16.3
			Arikareean		18.5
		Aquitanian			20.44
Paleogene	Oligocene	Chattian		Late Oligocene	23.03
		Rupelian		Early Oligocene	27.82
			Whitneyan		29.5
			Orellan		31.8
	Eocene	Priabonian	Chadronian	Late Eocene	33.9
		Priabonian	Duchesnean	Late Eocene	37
		Bartonian	Duchesnean	Middle Eocene	37.71
		Bartonian	Uintan		39.7
		Lutetian	Uintan		41.2
		Lutetian	Bridgerian		46.2
		Ypresian	Bridgerian	Early Eocene	47.8
			Wasatchian		50.5
			Clarkforkian		54.9
	Paleocene	Thanetian	Clarkforkian	Late Paleocene	56
		Thanetian	Tiffanian	Late Paleocene	56.2
		Selandian	Tiffanian	Middle Paleocene	59.2
		Selandian	Torrejonian	Middle Paleocene	60.9
		Danian	Torrejonian	Early Paleocene	61.6
		Danian	Puercan	Early Paleocene	63.8
					66